Gamma crystalline modification of 2,2', 2"-nitrilo[triethyl-tris

Details Gamma crystalline modification of 2,2', 2"-nitrilo[triethyl-tris Gamma crystalline modification of 2,2', 2"-nitrilo[triethyl-tris

1993-08-18

1994-07-19

Hoke, Veronica P.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

558 78, 558147, C07F 96574, C08K 552

Patent

active

053310314

ABSTRACT:
The gamma crystalline modification of 2,2',2"-nitrilo[triethyl-tris-(3,3',5,5'-tetra-tert-butyl-1,1'-biphenyl-2, 2'-diyl)phosphite] is obtained by crystallizing or recrystallizing said compound from an alkanol of 4 to 8 carbon atoms.
The gamma crystalline form is an effective process stabilizer for polyolefins, particularly polypropylene.

REFERENCES:
patent: 4318845 (1982-03-01), Spivack et al.
patent: 4374219 (1983-02-01), Spivack et al.
patent: 4683326 (1987-07-01), Orban et al.
Pure & Applied Chemistry--vol. 45, pp. 11-30 Pergamon Press, 1976.

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